Add missing GLM_COMPILER_GCC61 define #1101
@ -72,6 +72,7 @@
#define GLM_COMPILER_GCC49 0x02000100
#define GLM_COMPILER_GCC5 0x02000200
#define GLM_COMPILER_GCC6 0x02000300
#define GLM_COMPILER_GCC61 0x02000800
#define GLM_COMPILER_GCC7 0x02000400
#define GLM_COMPILER_GCC8 0x02000500