[PATCH 3.19.y-ckt 242/251] samples/bpf: fix in-source build of samples with clang

3.19.8-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Brenden Blanco commit b88c06e36dcb9b4ae285f7821f62d68dc34b25d3 upstream. in-source build of 'make samples/bpf/' was incorrectly using default compiler instead of invoking clang/llvm.

[PATCH 3.19.y-ckt 242/251] samples/bpf: fix in-source build of samples with clang

3.19.8-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Brenden Blanco bbla...@plumgrid.com commit b88c06e36dcb9b4ae285f7821f62d68dc34b25d3 upstream. in-source build of 'make samples/bpf/' was incorrectly using default compiler instead of