Use different names for GLES1 and GLES2 libraries, to allow parallel install

[freeglut] / freeglut.pc.in

prefix=@CMAKE_INSTALL_PREFIX@
libdir=${prefix}/lib
includedir=${prefix}/include

Name: glut
Description: A freely licensed and improved alternative to the GLUT library
Version: @VERSION_MAJOR@.@VERSION_MINOR@.@VERSION_PATCH@
Libs: -L${libdir} -l@PC_LIBNAME@
Libs.private: @PC_LIBS_PRIVATE@
Cflags: -I${includedir} @PC_CFLAGS@