Add patch to fix NEON issue

debian/changelog

@@ -1,3 +1,10 @@
+llvm-toolchain-3.8 (1:3.8.1-14) UNRELEASED; urgency=medium
+
+  * d/p/no-neon-on-armhf.patch: avoid defaulting to NEON instructions
+    for armhf (Closes: #842142).
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Fri, 04 Nov 2016 12:16:22 +0100
+
 llvm-toolchain-3.8 (1:3.8.1-13) unstable; urgency=medium
 
   * Fix a version issue with run-clang-tidy-3.8.py

debian/patches/no-neon-on-armhf.patch

@@ -0,0 +1,15 @@
+Description: Patch suggested from upstream, to build without a default NEON for arm*
+
+Bug-Debian: https://bugs.debian.org/842142
+
+--- llvm-toolchain-3.8-3.8.1.orig/clang/lib/Driver/Tools.cpp
++++ llvm-toolchain-3.8-3.8.1/clang/lib/Driver/Tools.cpp
+@@ -8437,7 +8437,7 @@ void gnutools::Assembler::ConstructJob(C
+     const llvm::Triple &Triple2 = getToolChain().getTriple();
+     switch (Triple2.getSubArch()) {
+     case llvm::Triple::ARMSubArch_v7:
+-      CmdArgs.push_back("-mfpu=neon");
++      CmdArgs.push_back("-mfpu=vfp");
+       break;
+     case llvm::Triple::ARMSubArch_v8:
+       CmdArgs.push_back("-mfpu=crypto-neon-fp-armv8");

debian/patches/series

@@ -51,3 +51,4 @@ lldb-arm64.diff
 clang-tidy-run-bin.diff
 
 silent-llvm-symbolizer.diff
+no-neon-on-armhf.patch