Minic GNU basename() API for non-glibc library e.g. musl

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Index: poppler-0.64.0/utils/pdfsig.cc
===================================================================
--- poppler-0.64.0.orig/utils/pdfsig.cc
+++ poppler-0.64.0/utils/pdfsig.cc
@@ -35,6 +35,10 @@
 #include "Win32Console.h"
 #include "numberofcharacters.h"
 
+#if !defined(__GLIBC__)
+#define basename(src) (strrchr(src,'/') ? strrchr(src,'/')+1 : src)
+#endif
+
 static const char * getReadableSigState(SignatureValidationStatus sig_vs)
 {
   switch(sig_vs) {