Fix __mulodi4 symbol not found build break.

Summary:
    Error message:
    DerivedSources/ForwardingHeaders/wtf/CheckedArithmetic.h:458: error: undefined reference to '__mulodi4'

    This happens only on debug build + ARMv7

    NDK r19 did fix this:
    android/ndk#184

    To aligned NDK r17c with RN, fallback to use non bulitin overflow
    check.

    Related context:
    https://codereview.chromium.org/2011073002

patches/jsc.patch

@@ -300,3 +300,33 @@ diff -aur /dev/null target/webkit/Source/JavaScriptCore/polyfills/log2.cpp
 +  return log(x) / log(2.0);
 +}
 +#endif
+diff -aur target-org/webkit/Source/WTF/wtf/CheckedArithmetic.h target/webkit/Source/WTF/wtf/CheckedArithmetic.h
+--- target-org/webkit/Source/WTF/wtf/CheckedArithmetic.h	2018-07-26 17:00:09.000000000 +0800
++++ target/webkit/Source/WTF/wtf/CheckedArithmetic.h	2019-04-12 12:03:55.000000000 +0800
+@@ -317,7 +317,7 @@
+
+     static inline bool multiply(LHS lhs, RHS rhs, ResultType& result) WARN_UNUSED_RETURN
+     {
+-#if COMPILER(GCC_OR_CLANG)
++#if COMPILER(GCC_OR_CLANG) && CPU(ARM_THUMB2) && defined(NDEBUG)
+         ResultType temp;
+         if (__builtin_mul_overflow(lhs, rhs, &temp))
+             return false;
+@@ -390,7 +390,7 @@
+
+     static inline bool multiply(LHS lhs, RHS rhs, ResultType& result) WARN_UNUSED_RETURN
+     {
+-#if COMPILER(GCC_OR_CLANG)
++#if COMPILER(GCC_OR_CLANG) && CPU(ARM_THUMB2) && defined(NDEBUG)
+         ResultType temp;
+         if (__builtin_mul_overflow(lhs, rhs, &temp))
+             return false;
+@@ -453,7 +453,7 @@
+
+     static inline bool multiply(int64_t lhs, int64_t rhs, ResultType& result)
+     {
+-#if COMPILER(GCC_OR_CLANG)
++#if COMPILER(GCC_OR_CLANG) && CPU(ARM_THUMB2) && defined(NDEBUG)
+         ResultType temp;
+         if (__builtin_mul_overflow(lhs, rhs, &temp))
+             return false;