adsp.biquad.filters: add patch to fix build with gcc-6

packages/mediacenter/kodi-binary-addons/adsp.biquad.filters/patches/adsp.biquad.filters-gcc-6.patch

@@ -0,0 +1,35 @@
+From abae62ace5cd09025acaf8e03e5edad94131ff07 Mon Sep 17 00:00:00 2001
+From: Bernd Kuhls <bernd.kuhls@t-online.de>
+Date: Sun, 24 Apr 2016 22:42:07 +0200
+Subject: [PATCH] ADSPHelpers.cpp: Fix compilation with gcc6
+
+Fixes https://github.com/kodi-adsp/adsp.biquad.filters/issues/13
+
+Patch inspired by
+https://github.com/assaultcube/AC/commit/752950989b4e286459ca9aee3d61a868d7b20fa4
+---
+ src/template/ADSPHelpers.cpp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/template/ADSPHelpers.cpp b/src/template/ADSPHelpers.cpp
+index 5aa6a7d..f66e77f 100644
+--- a/src/template/ADSPHelpers.cpp
++++ b/src/template/ADSPHelpers.cpp
+@@ -24,7 +24,7 @@
+ using namespace std;
+ 
+ #if !defined(TARGET_WINDOWS)
+-  inline float abs(float Val)
++  inline float iabs(float Val)
+   {
+     if(Val >= 0.0f)
+     {
+@@ -441,7 +441,7 @@ float CADSPHelpers::Convert_dB_TO_Value(float dB)
+ 
+ float CADSPHelpers::Convert_Value_TO_dB(float Scale)
+ {
+-  return 20.0f*log10f(abs(Scale));
++  return 20.0f*log10f(iabs(Scale));
+ }
+ 
+ // reserved for future implementation