Update with 0.3.7 changes

Author: martin-frbg

Changelog.txt

@@ -1,4 +1,47 @@
 OpenBLAS ChangeLog
+====================================================================
+Version 0.3.7
+11-Aug 2019
+
+common:
+	* having the gmake special variables TARGET_ARCH or TARGET_MACH
+	  defined no longer causes build failures in ctest or utest
+	* defining NO_AFFINITY or USE_TLS to 0 in gmake builds no longer
+	  has the same effect as setting them to 1
+	* a new test program was added to allow checking the library for
+	  thread safety
+	* a new option USE_LOCKING was added to ensure thread safety when
+	  OpenBLAS itself is built without multithreading but will be 
+	  called from multiple threads.
+	* a build failure on Linux with glibc versions earlier than 2.5
+	  was fixed
+	* a runtime error with CPU enumeration (and NO_AFFINITY not set)
+	  on glibc 2.6 was fixed
+	* NO_AFFINITY was added to the CMAKE options (and defaults to being
+	  active on Linux, as in the gmake builds)
+
+x86_64:
+	* the build-time logic for detection of AVX512 availability in
+	  the processor and compiler was fixed
+	* gmake builds on OSX now set the internal name of the library to 
+	  libopenblas.0.dylib (consistent with CMAKE)
+ 	* the Haswell DGEMM kernel received a significant speedup through
+	  improved prefetch and load instructions
+	* performance of DGEMM, DTRMM, DTRSM and ZDOT on Zen/Zen2 was markedly
+	  increased by avoiding vpermpd instructions
+ 	* the SKYLAKEX (AVX512) DGEMM helper functions have now been disabled
+	  to fix remaining errors in DGEMM, DSYMM and DTRMM
+
+## POWER:
+	* added support for building on FreeBSD/powerpc64 and FreeBSD/ppc970
+	* added optimized kernels for POWER9 single and double precision complex BLAS3
+	* added optimized kernels for POWER9 SGEMM and STRMM
+
+## ARMV7:
+	* fixed the softfp implementations of xAMAX and IxAMAX
+	* removed the predefined -march= flags on both ARMV5 and ARMV6 as
+	  they were appropriate for only a subset of platforms
+
 ====================================================================
 Version 0.3.6
 29-Apr-2019