Bump to xamarin/xamarin-android-binutils/L_15.0.7-5.0.3@6721af4b (#7742)

Context: https://discourse.llvm.org/t/llvm-15-0-4-released/66337
Context: https://discourse.llvm.org/t/llvm-15-0-5-release/66616
Context: https://discourse.llvm.org/t/llvm-15-0-6-released/66899
Context: https://discourse.llvm.org/t/llvm-15-0-7-release/67638

Changes: dotnet/android-native-tools@L_15.0.3-5.0.2...L_15.0.7-5.0.3

  * dotnet/android-native-tools@6721af4: Bump LLVM to 15.0.7
  * dotnet/android-native-tools@7a0197c: Pass --no-relax to the linker, until MonoVM doesn't need it anymore
  * dotnet/android-native-tools@2a872aa: CodeQL pipeline (dotnet/android-native-tools#3)
  * dotnet/android-native-tools@dcfe7dd: Update workflow action versions

Changes: llvm/llvm-project@4a2c05b...8dfdcc7

	% git diff --shortstat 4a2c05b0...8dfdcc7b
	 116 files changed, 2377 insertions(+), 874 deletions(-)

Bump to LLVM 15.0.7.

This might be the last release in the LLVM 15 series.

Additionally, the `ldd` wrapper scripts now pass the `--no-relax`
argument to the linker.  This argument is required by MonoVM's
AOT compiler.

Author: grendello

build-tools/xaprepare/xaprepare/ConfigAndData/Configurables.cs

@@ -15,7 +15,7 @@ namespace Xamarin.Android.Prepare
 	//
 	partial class Configurables
 	{
-		const string BinutilsVersion                = "L_15.0.3-5.0.2";
+		const string BinutilsVersion                = "L_15.0.7-5.0.3";
 
 		const string MicrosoftOpenJDK11Version      = "11.0.16";
 		const string MicrosoftOpenJDK11Release      = "8.1";