File ltrace-fix-build.patch of Package ltrace

Index: ltrace-0.7.91/testsuite/ltrace.main/filters.exp
===================================================================
--- ltrace-0.7.91.orig/testsuite/ltrace.main/filters.exp	2014-09-02 13:39:08.000000000 +0200
+++ ltrace-0.7.91/testsuite/ltrace.main/filters.exp	2017-11-24 17:26:00.000000000 +0100
@@ -22,6 +22,7 @@ set libfilt1 [ltraceCompile libfilt1.so
 }]]
 
 set libfilt2 [ltraceCompile libfilt2.so [ltraceSource c {
+    extern int puts(const char *s);
     void func2(void) { puts("func2"); }
 }]]