added mgba to extras

cores/makefile

@@ -1,7 +1,7 @@
 # this logic was broken out from picoarch's all-in-one makefile
 
 CORES = fceumm gambatte gpsp pcsx_rearmed picodrive snes9x2005_plus
-CORES+= beetle-vb fake-08 mednafen_supafaust pokemini # extras
+CORES+= beetle-vb fake-08 mednafen_supafaust mgba pokemini # extras
 
 ###############################
 

cores/patches/mgba.patch

@@ -0,0 +1,31 @@
+diff --git forkSrcPrefix/Makefile.libretro forkDstPrefix/Makefile.libretro
+index 108148f4579f4727146e5b8c1e05ef7382654208..4ff34d4c2b5c6031ce4c3256f1b70daba99a583c 100644
+--- forkSrcPrefix/Makefile.libretro
++++ forkDstPrefix/Makefile.libretro
+@@ -417,6 +417,26 @@ else ifeq ($(platform), miyoo)
+    CFLAGS += -fno-common -ftree-vectorize -funswitch-loops
+    DEFINES += -std=c99
+ 
++# RG35XX
++else ifeq ($(platform), rg35xx)
++   TARGET := $(TARGET_NAME)_libretro.so
++   CC = $(CROSS_COMPILE)gcc
++   CXX = $(CROSS_COMPILE)g++
++   AR = $(CROSS_COMPILE)ar
++   SHARED := -shared -Wl,--version-script=link.T
++   fpic := -fPIC
++   PLATFORM_DEFINES += -D_GNU_SOURCE -DHAVE_STRTOF_L -DHAVE_LOCALE
++   CFLAGS += -fomit-frame-pointer -ffast-math
++   CFLAGS += -marm -mtune=cortex-a9 -mfpu=neon-fp16 -mfloat-abi=hard -march=armv7-a
++   CFLAGS += -fno-common -ftree-vectorize -funswitch-loops
++   HAVE_NEON = 1
++   ARCH = arm
++   BUILTIN_GPU = neon
++   CPU_ARCH := arm
++   MMAP_JIT_CACHE = 1
++   HAVE_DYNAREC = 1
++   DEFINES += -std=c99
++
+ # Windows
+ else
+    TARGET := $(TARGET_NAME)_libretro.dll