Fix a compile time warning in the linker testsuite when compiling using clang.

* testsuite/ld-elf/pr26094-1b.c (main): Change return type to
	int.

ld/ChangeLog

@@ -1,3 +1,8 @@
+2020-06-11  Nick Clifton  <nickc@redhat.com>
+
+	* testsuite/ld-elf/pr26094-1b.c (main): Change return type to
+	int.
+
 2020-06-10  Alan Modra  <amodra@gmail.com>
 
 	* testsuite/ld-elf/linux-x86.exp: Build tests when non-native.

ld/testsuite/ld-elf/pr26094-1b.c

@@ -1,6 +1,6 @@
 extern void *foo();
 
-void main()
+int main (void)
 {
-    foo();
-}
+  foo(); return 0;
+}