Set GOFLAGS in Makefile; bump minimum iOS version

xcode/Makefile

@@ -9,6 +9,7 @@ ios-hw: clean
 	GOOS=ios \
 	GOARCH=arm64 \
 	GOARM64=v8.3,crypto \
+	GOFLAGS='-trimpath "-ldflags=-s -w" -buildvcs=false' \
 	SDK=iphoneos \
 	CC=$(PWD)/clangwrap.sh \
 	CGO_CFLAGS="-fembed-bitcode" \
@@ -22,6 +23,7 @@ ios-sim: clean
 	GOOS=ios \
 	GOARCH=arm64 \
 	GOARM64=v8.4,crypto \
+	GOFLAGS='-trimpath "-ldflags=-s -w" -buildvcs=false' \
 	SDK=iphonesimulator \
 	CC=$(PWD)/clangwrap.sh \
 	go build -buildmode=c-archive -tags ios -o $(BUILD_DIR)/cmutton-ios-sim.a ..
@@ -34,6 +36,7 @@ macos: clean
 	GOOS=darwin \
 	GOARCH=arm64 \
 	GOARM64=v8.4,crypto \
+	GOFLAGS='-trimpath "-ldflags=-s -w" -buildvcs=false' \
 	SDK=macosx \
 	go build -buildmode=c-archive -o $(BUILD_DIR)/cmutton-macos.a ..
 	echo '#import "types.h"\n#import "cmutton-macos.h"' > $(BUILD_DIR)/cmutton-Bridging-Header-macos.h

xcode/clangwrap.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-MIN_VERSION=26.0
+MIN_VERSION=26.2
 
 SDK_PATH=`xcrun --sdk $SDK --show-sdk-path`
 CLANG=`xcrun --sdk $SDK --find clang`