Fix Clang baseline violation

Upstream Clang on i386 defaults to -march=pentium4, which violates the current
i386 baseline, so change it to default to the current baseline.

debian/patches/clang-baseline-fix-i386.patch

@@ -0,0 +1,13 @@
+--- a/clang/lib/Driver/ToolChains/Arch/X86.cpp
++++ b/clang/lib/Driver/ToolChains/Arch/X86.cpp
+@@ -105,8 +105,8 @@ const char *x86::getX86TargetCPU(const ArgList &Args,
+   case llvm::Triple::Haiku:
+     return "i586";
+   default:
+-    // Fallback to p4.
+-    return "pentium4";
++    // Fallback to i686.
++    return "i686";
+   }
+ }
+

debian/patches/series

@@ -54,6 +54,7 @@ remove-test-freezing.diff
 impl-path-hurd.diff
 powerpcspe-add-missing-include-path.diff
 x32-fix-driver-search-paths.diff
+clang-baseline-fix-i386.patch
 
 # OpenMP