tools, bpf: Do not force gcc as CC

This allows transparent cross-compilation with CROSS_COMPILE by
relying on 7ed1c1901fe5 ("tools: fix cross-compile var clobbering").

Same change was applied to tools/bpf/bpftool/Makefile in
9e88b9312acb ("tools: bpftool: do not force gcc as CC").

Signed-off-by: Brett Mastbergen <[e-mail]>
Signed-off-by: Daniel Borkmann <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/bpf/Makefile

···
 
 prefix ?= /usr/local
 
-CC = gcc
 LEX = flex
 YACC = bison
 MAKE = make