Fix(iOS): fix freetype build

It looks like latest Xcode has removed typedef Byte, causing freetype to fail compilation. Freetype also internally define it only if it's not Apple platform. A hack define is added to make it compile again.

buildlibs.sh

@@ -5,7 +5,24 @@ cd freetype-$BUILD_FREETYPE_VERSION
 
 echo "Building Freetype"
 
-if [[ "$BUILD_IOS" != "1" ]]; then
+if [[ "$BUILD_IOS" == "1" ]]; then
+  LDFLAGS=-"arch arm64 -isysroot $thesysroot -miphoneos-version-min=12.0"
+  export CC=$thecc
+  export CXX=$thecxx
+  ./configure \
+    --host=$TARGET \
+    --prefix=${PWD}/build_android-${TARGET_SHORT} \
+    --enable-shared=no --enable-static=yes \
+    --without-zlib \
+    --with-brotli=no \
+    --with-png=no \
+    --with-harfbuzz=no \
+    "CFLAGS=-arch arm64 -pipe -std=c99 -Wno-trigraphs -fpascal-strings -Os -Wreturn-type -Wunused-variable -fmessage-length=0 -fvisibility=hidden -miphoneos-version-min=12.0 -I$thesysroot/usr/include/libxml2/ -isysroot $thesysroot -DByte=uint8_t" \
+    AR=/usr/bin/ar \
+    "LDFLAGS=$LDFLAGS" \
+    || error_code=$?
+namefreetype=build_android-${TARGET_SHORT}/lib/libfreetype
+else
   export PATH=$TOOLCHAIN/bin:$PATH
   ./configure \
     --host=$TARGET \
@@ -20,6 +37,7 @@ if [[ "$error_code" -ne 0 ]]; then
   cat config.log
   exit $error_code
 fi
+fi
 
 CFLAGS=-fno-rtti CXXFLAGS=-fno-rtti make -j4
 make install
@@ -27,4 +45,3 @@ make install
 if [[ -f "${namefreetype}.a" ]]; then
   clang -fPIC -shared $LDFLAGS -lbz2 -Wl,-all_load ${namefreetype}.a -o ${namefreetype}.dylib
 fi
-fi