Fix for missing log2 symbol

Author: Kudo

patches/jsc.patch

@@ -325,3 +325,24 @@ diff -aur target-org/webkit/Source/WTF/wtf/linux/MemoryFootprintLinux.cpp target
  template<typename Functor>
  static void forEachLine(FILE* file, Functor functor)
  {
+diff -aur target-org/webkit/Source/JavaScriptCore/Sources.txt target/webkit/Source/JavaScriptCore/Sources.txt
+--- target-org/webkit/Source/JavaScriptCore/Sources.txt 2018-11-11 23:05:40.000000000 +0800
++++ target/webkit/Source/JavaScriptCore/Sources.txt     2018-11-12 00:03:26.000000000 +0800
+@@ -1046,3 +1046,6 @@
+
+ // Derived Sources
+ yarr/YarrCanonicalizeUnicode.cpp
++
++// Polyfills
++polyfills/log2.cpp
+diff -aur /dev/null target/webkit/Source/JavaScriptCore/polyfills/log2.cpp
+--- /dev/null   2018-11-12 01:21:57.000000000 +0800
++++ target/webkit/Source/JavaScriptCore/polyfills/log2.cpp      2018-11-12 01:19:49.000000000 +0800
+@@ -0,0 +1,7 @@
++#include <math.h>
++
++#if defined(__ANDROID__) && __ANDROID_API__ < 19
++double log2(double x) {
++  return log(x) / log(2.0);
++}
++#endif

scripts/compile/common.sh

@@ -126,6 +126,7 @@ COMMON_LDFLAGS=" \
 -Wl,--icf=safe \
 -Wl,-z,noexecstack \
 -Wl,--gc-sections \
+-Wl,--no-undefined \
 "
 
 COMMON_CFLAGS=" \