Include sys/types.h for proper typedefs related to wait()

Should fix #1519

* Rewrite ROTMG based on the new implementation in GONUM based on the algorithm proposed by Tim Hopkins, see issue 1452 for the reference
* Correct ROTMG utest for issue1452 and add another from gonum, also correct transposition of expected and observed values in error messages

* Restore the remaining utests

* Try fork test on Cygwin and Linux only, it hangs on at least ARMv8/Android as well

* Use generic sswap/dswap kernels for NEHALEM 32bit to fix fault found by the restored swap utest

* Disable zdotu test for MS cl to work around runtime error -1073741819 on AppVeyor for now
(probably coding error in the initialization of the complex numbers or wrong choice of zdotu API)

Fixes 1456

Keep the flag handling separate from the scaling loops in rotmg

If OpenBLAS is built using add_subdirectory(OpenBlas) as part of another project
then the paths set by CMAKE_XXX_DIR are relative to the parent project
and not the OpenBLAS project.

Test requested in issue xianyi/OpenBLAS#484.

Run tests by applying the following change and then make:

	diff --git a/Makefile.rule b/Makefile.rule
	index bea1fe1..9852ff3 100644
	--- a/Makefile.rule
	+++ b/Makefile.rule
	@@ -140,7 +140,7 @@ NO_AFFINITY = 1

	-# UTEST_CHECK = 1
	+UTEST_CHECK = 1

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

Thanks José Luis García Pallero