Add a 'no_assets' option to Qt that allows building without pre-compiled assets inside the binary.
GCC has issues with high memory usage when compiling the assets file, so this is used as a workaround for Travis.
Should help distros packaging ppsspp. Note: if you currently use PPSSPPQt, you will need to move the config dir from PPSSPPQt to ppsspp.
For distro packagers, you can now use PREFIX and DESTDIR for installs.
Stops builds from showing success when there was an error.
Had to workaround grep's issue of returning '1' when there is no matches. There is unfortunately no alternative.
Removed bin/bash header as it could restrict alternative shells.
Used set -e to break script whenever a non-zero return is encountered.
CMake was returning non-zero on CMAKE_TOOLCHAIN_FILE not being required. Now check for that in CMake instead of platform/abi. If the abi is missing and toolchain is not, that would have been the wrong advice anyway.
