BOARD: separate miyoo packages + concentrate RetroArch/libretro (#129)

MENU->Target packages ---> Miyoo Packages ---> ...

package/miyoo/retroarch/libretro-tyrquake/0001-optimize-flags.patch

@@ -0,0 +1,33 @@
+diff --git a/Makefile b/Makefile
+index ef82d42..b3220b8 100644
+--- a/Makefile
++++ b/Makefile
+@@ -232,9 +232,15 @@ else ifeq ($(platform), miyoo)
+         TARGET := $(TARGET_NAME)_libretro.so
+         CC = /opt/miyoo/usr/bin/arm-linux-gcc
+         AR = /opt/miyoo/usr/bin/arm-linux-ar
+-        fpic := -fPIC
++        fpic := -fno-PIC
+         SHARED := -shared -Wl,--version-script=common/libretro-link.T
+-        CFLAGS += -DDINGUX -D_MIYOO -fomit-frame-pointer -ffast-math -mcpu=arm926ej-s
++        CFLAGS += -DDINGUX -D_MIYOO -ffast-math -mcpu=arm926ej-s -Ofast -fdata-sections -ffunction-sections -fsingle-precision-constant -flto -DARM
++	CFLAGS += -fdata-sections -ffunction-sections -Wl,--gc-sections \
++	-fno-stack-protector -fno-ident -fomit-frame-pointer \
++	-falign-functions=1 -falign-jumps=1 -falign-loops=1 \
++	-fno-unwind-tables -fno-asynchronous-unwind-tables -fno-unroll-loops \
++	-fmerge-all-constants -fno-math-errno \
++	-marm
+         HAVE_NETWORKING=0
+ 
+ # Raspberry Pi 1
+@@ -689,8 +695,8 @@ endif
+    CFLAGS   += -DDEBUG
+    CXXFLAGS += -DDEBUG
+ else
+-   CFLAGS   += -O2 -DNDEBUG
+-   CXXFLAGS += -O2 -DNDEBUG
++   CFLAGS   += -O3 -DNDEBUG
++   CXXFLAGS += -O3 -DNDEBUG
+ endif
+ 
+ ifneq (,$(findstring msvc,$(platform)))