make.bash: fix misuse of continue

Apparently, in bash, the "continue" keyword can only be used
inside of a loop, not in an if block. If readelf exists but $CC
does not, make.bash emits a warning:

./make.bash: line 135: continue: only meaningful in a `for', `while', or `until' loop

Change it to a conditional.

Change-Id: I00a0940ed99bc0c565094e506705961b6b3d362e
Reviewed-on: https://go-review.googlesource.com/c/go/+/320170
Trust: Cherry Mui <[email protected]>
Run-TryBot: Cherry Mui <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Cuong Manh Le <[email protected]>

Author: cherrymui

src/make.bash

@@ -132,10 +132,11 @@ fi
 
 # Test which linker/loader our system is using
 if type readelf >/dev/null 2>&1; then
-	echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - || continue
-	LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
-	[ -z "$LDSO" ] || export GO_LDSO="$LDSO"
-	rm -f ./test-musl-ldso
+	if echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - >/dev/null 2>&1; then
+		LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
+		[ -z "$LDSO" ] || export GO_LDSO="$LDSO"
+		rm -f ./test-musl-ldso
+	fi
 fi
 
 # Clean old generated file that will cause problems in the build.