Add upstream patch to fix the build with clang + ALSA option.

Extend the compiler check so that the code is built with -std=c99, which is
required by the ALSA headers. Bump PORTREVISION because this also changes
the build flags for GCC users.

PR:		204858
MFH:		2015Q4

audio/libkcompactdisc/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	libkcompactdisc
 PORTVERSION=	${KDE4_VERSION}
+PORTREVISION=	1
 CATEGORIES=	audio kde
 MASTER_SITES=	KDE/${KDE4_BRANCH}/${PORTVERSION}/src
 DIST_SUBDIR=	KDE/${PORTVERSION}

audio/libkcompactdisc/files/patch-git_d6927712

@@ -0,0 +1,33 @@
+Makes the port build with clang when the ALSA option is on.
+
+commit d69277128afb60999e420c533e826b0061fc40eb
+Author: Raphael Kubo da Costa <rakuco@FreeBSD.org>
+Date:   Sat Nov 28 14:27:45 2015 +0100
+
+    Extend -std=c99 compiler flag to clang.
+
+    The ALSA headers use features such as the `inline' keyword that require
+    C99 support. Commit e36c628 ("Fix compilation: ALSA no longer compiles
+    with -std=c90") started passing it to the compiler when GCC is used.
+
+    We now do the same for clang with a better comment, and also append the
+    flag to the existing CMAKE_C_FLAGS, otherwise we lose several other
+    options which are set by FindKDE4Internal.cmake.
+
+--- CMakeLists.txt
++++ CMakeLists.txt
+@@ -7,9 +7,12 @@ include(MacroLibrary)
+ add_definitions(${QT_DEFINITIONS} ${KDE4_DEFINITIONS})
+ 
+ ## Compiler flags
+-if(CMAKE_COMPILER_IS_GNUCXX)
+-    set(CMAKE_C_FLAGS "-std=c99")   ## ALSA no longer compiles with -std=c90, see https://bugzilla.novell.com/show_bug.cgi?id=817077
++if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
++    # ALSA does not build with the default -std=iso9899:1990 from FindKDE4Internal.cmake.
++    # See https://bugzilla.novell.com/show_bug.cgi?id=817077 for more information.
++    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
+ endif()
++
+ find_package(Alsa)
+ alsa_configure_file(${CMAKE_CURRENT_BINARY_DIR}/config-alsa.h)
+