misc/ios: bump min version

For #48076

Change-Id: I5edaa43af82c3478555c309a001a3d1b16de3d64
Reviewed-on: https://go-review.googlesource.com/c/go/+/368615
Run-TryBot: Cherry Mui <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Roland Shoemaker <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: changkun

misc/ios/clangwrap.sh

@@ -17,4 +17,4 @@ export IPHONEOS_DEPLOYMENT_TARGET=5.1
 # cmd/cgo doesn't support llvm-gcc-4.2, so we have to use clang.
 CLANG=`xcrun --sdk $SDK --find clang`
 
-exec "$CLANG" -arch $CLANGARCH -isysroot "$SDK_PATH" -m${PLATFORM}-version-min=10.0 "$@"
+exec "$CLANG" -arch $CLANGARCH -isysroot "$SDK_PATH" -m${PLATFORM}-version-min=12.0 "$@"