include/common.h: fix build against musl

Like uClibc version older than (not yet released) 0.9.34 musl does not have
a rpmatch() implementation.

uClibc defines both __UCLIBC__ and __GLIBC__. So first check for uCibc and its
version and then for a non glibc implementation (like musl). Note, musl does
not define __MUSL__.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
1 file changed