glsm: move it out of libretro-common, into libretro/glsm

libretro-common upstream no longer has glsm, and this copy carries the
core's own changes, so it is the core's code: it lives with the rest of it
now, and libretro-common/ stays a plain sync of upstream. The headers keep
their <glsm/...> names, found through the libretro/ include path every
build already has; the Makefile, the MSVC 2013 project and the glsm and
Glitch64 tests point at the new place.

Makefile

@@ -1258,7 +1258,7 @@ lrhost_gl$(EXE_EXT): tools/lrhost.c tools/lrhost_gl.h $(LIBRETRO_COMM_DIR)/featu
 # write, and its texture uploads for desktop GL and for GLES 2
 GLITCH64_TEST_SRCS := $(VIDEODIR_GLIDE)/Glitch64/glitchmain.c $(VIDEODIR_GLIDE)/Glitch64/glitch64_combiner.c \
 	$(VIDEODIR_GLIDE)/Glitch64/geometry.c $(VIDEODIR_GLIDE)/Glitch64/glitch64_textures.c \
-	$(LIBRETRO_COMM_DIR)/glsm/glsm.c $(LIBRETRO_COMM_DIR)/gfx/gl_capabilities.c $(LIBRETRO_COMM_DIR)/glsym/rglgen.c
+	$(ROOT_DIR)/libretro/glsm/glsm.c $(LIBRETRO_COMM_DIR)/gfx/gl_capabilities.c $(LIBRETRO_COMM_DIR)/glsym/rglgen.c
 GLITCH64_TEST_FLAGS := -D__LIBRETRO__ -DINLINE=inline -DM64P_PLUGIN_API -DM64P_CORE_PROTOTYPES -DHAVE_GLIDE64 \
 	-I$(VIDEODIR_GLIDE)/Glitch64/inc -I$(ROOT_DIR)/include -I$(ROOT_DIR)/libretro -I$(LIBRETRO_COMM_DIR)/include \
 	-I$(CORE_DIR)/src -I$(CORE_DIR)/src/api $(filter -fsanitize=% -O% -g,$(CFLAGS)) -w

Makefile.common

@@ -305,7 +305,7 @@ endif
 # Libretro
 
 ifeq ($(HAVE_OPENGL),1)
-SOURCES_C += $(LIBRETRO_COMM_DIR)/glsm/glsm.c \
+SOURCES_C += $(LIBRETRO_DIR)/glsm/glsm.c \
 				 $(LIBRETRO_DIR)/aleck64_e90_gl.c
 endif
 

libretro/msvc/msvc-2013/msvc-2013.vcxproj

@@ -737,7 +737,7 @@
     <ClCompile Include="..\..\..\libretro-common\conversion\float_to_s16.c" />
     <ClCompile Include="..\..\..\libretro-common\conversion\s16_to_float.c" />
     <ClCompile Include="..\..\..\libretro-common\features\features_cpu.c" />
-    <ClCompile Include="..\..\..\libretro-common\glsm\glsm.c" />
+    <ClCompile Include="..\..\glsm\glsm.c" />
     <ClCompile Include="..\..\..\libretro-common\glsym\glsym_gl.c" />
     <ClCompile Include="..\..\..\libretro-common\glsym\rglgen.c" />
     <ClCompile Include="..\..\..\libretro-common\libco\libco.c" />

libretro/msvc/msvc-2013/msvc-2013.vcxproj.filters

@@ -495,7 +495,7 @@
     <ClCompile Include="..\..\..\libretro-common\libco\libco.c">
       <Filter>Source Files\libretro\libco</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\libretro-common\glsm\glsm.c">
+    <ClCompile Include="..\..\glsm\glsm.c">
       <Filter>Source Files\libretro\glsm</Filter>
     </ClCompile>
     <ClCompile Include="..\..\..\mupen64plus-core\src\dd\dd_controller.c">

tools/test_glsm_frame_boundary.py

@@ -35,6 +35,7 @@ def main():
             "-DHAVE_OPENGLES3", "-DHAVE_THR_AL", "-DHAVE_PARALLEL",
             f'-DGLSM_FRAME_BOUNDARY_SOURCE="{header}"',
             "-I" + str(root / "libretro-common/include"),
+            "-I" + str(root / "libretro"),
             str(root / "tools/test_glsm_gles3.c"),
             str(root / "libretro-common/glsym/glsym_es3.c"),
             str(root / "libretro-common/glsym/rglgen.c"),

tools/test_glsm_gles3.c

@@ -1,4 +1,4 @@
-/* cc -std=c99 -DHAVE_OPENGLES -DHAVE_OPENGLES3 -Ilibretro-common/include
+/* cc -std=c99 -DHAVE_OPENGLES -DHAVE_OPENGLES3 -Ilibretro-common/include -Ilibretro
  * tools/test_glsm_gles3.c libretro-common/glsym/glsym_es3.c
  * libretro-common/glsym/rglgen.c -lEGL -lGLESv2 -o test_glsm_gles3
  * EGL_PLATFORM=surfaceless ./test_glsm_gles3
@@ -7,7 +7,7 @@
 #include <EGL/egl.h>
 #include <glsym/glsym.h>
 #ifndef GLSM_SOURCE
-#define GLSM_SOURCE "../libretro-common/glsm/glsm.c"
+#define GLSM_SOURCE "../libretro/glsm/glsm.c"
 #endif
 #include GLSM_SOURCE