Fix build with clang: in contrast to lang/clang, the one from base adds

"FreeBSD" in front of it which broke the detection of the compiler name.
If the operating system name is added, use the second word as the compiler
name.

PR:		ports/159250
Submitted by:	Test Rat (ttsestt gmail.com)
Approved by:	maintainer (in private mail)

multimedia/mplayer/files/patch-configure

@@ -28,6 +28,15 @@
  fi
  
  if netbsd || dragonfly ; then
+@@ -1661,7 +1660,7 @@ else
+       echores "$cc_version"
+       break
+     fi
+-    cc_name_tmp=$($_cc -v 2>&1 | head -n 1 | cut -d ' ' -f 1)
++    cc_name_tmp=$($_cc -v 2>&1 | awk "NR == 1 { if(\$1 == \"$system_name\") print \$2; else print \$1 }")
+     if test "$cc_name_tmp" = "clang"; then
+       echocheck "$_cc version"
+       cc_vendor=clang
 @@ -3577,22 +3576,10 @@
  if linux ; then
    THREAD_CFLAGS=-D_REENTRANT