nix: bump clang to 15 & patch Glog for CC,CXX flag (#18108)

After upgrading MacOS to Sonoma and Xcode to 15, pod install stage would fail with clang errors.
Turns out that react-native's configure glog script sets 2 additional flags, CC and CXX which conflicts with flags already set in nix iOS shell.

In this commit we :

- bump clang from 10.0.0 to 15.0.7
- patch glog configure script to avoid setting those flags

This fixes the iOS builds.

nix/deps/nodejs-patched/default.nix

@@ -14,6 +14,7 @@ stdenv.mkDerivation {
     "patchJavaPhase"
     "patchReactNativePhase"
     "patchPodPhase"
+    "patchGlogPhase"
     "installPhase"
   ];
 
@@ -98,6 +99,14 @@ stdenv.mkDerivation {
           '[RCTConvert UIColor:options.tintColor() ? @(*options.tintColor()) : nil];'
   '';
 
+  # Fix pod issue after upgrading to MacOS Sonoma and Xcode 15
+  # https://github.com/status-im/status-mobile/issues/17682
+  patchGlogPhase = ''
+    substituteInPlace ./node_modules/react-native/scripts/ios-configure-glog.sh \
+    --replace 'export CC="' '#export CC="' \
+    --replace 'export CXX="' '#export CXX="'
+  '';
+
   # The ELF types are incompatible with the host platform, so let's not even try
   # TODO: Use Android NDK to strip binaries manually
   dontPatchELF = true;

nix/overlay.nix

@@ -73,6 +73,7 @@ in {
     allowHigher = true;
   };
   go = super.go_1_19;
+  clang = super.clang_15;
   buildGoPackage = super.buildGo119Package;
   buildGoModule = super.buildGo119Module;
   gomobile = (super.gomobile.overrideAttrs (old: {