patch 8.2.3785: running CI on MacOS with gcc is not useful

Problem:    Running CI on MacOS with gcc is not useful.
Solution:   Only use clang. (Ozaki Kiichi, closes #9326)  Also build with
            normal features.

.github/workflows/ci.yml

@@ -255,7 +255,7 @@ jobs:
     runs-on: macos-latest
 
     env:
-      CC: ${{ matrix.compiler }}
+      CC: clang
       TEST: test
       SRCDIR: ./src
       LEAK_CFLAGS: -DEXITFREE
@@ -264,8 +264,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        features: [tiny, huge]
-        compiler: [clang, gcc]
+        features: [tiny, normal, huge]
 
     steps:
       - uses: actions/checkout@v2
@@ -286,6 +285,8 @@ jobs:
             echo "TEST=testtiny"
             echo "CONFOPT=--disable-gui"
             ;;
+          normal)
+            ;;
           huge)
             echo "CONFOPT=--enable-perlinterp --enable-python3interp --enable-rubyinterp --enable-luainterp --enable-tclinterp"
             ;;

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3785,
 /**/
     3784,
 /**/