Fix for incorrect configure python library variable

[ajarzyn]

BLDLIBRARY isn't consistent depending on the how the original python got built.

> python  -m sysconfig | grep BLDLIB
	BLDLIBRARY = "-L. -lpython2.7"

> python  -m sysconfig | grep BLDLIB
	BLDLIBRARY = ""

> python -m sysconfig | grep BLDLIB
	BLDLIBRARY = "libpython3.8.a"

---

locally i've reverted the config code back to pre-ecbdcf17884551b823fcef12cd5bd91103bde1fc (nov 7, 2019)

+    if test "$PyMAJVERSION" -eq "3"; then
+        LDLIBS1="-lpython${PyMAJVERSION}"
+    else
+        LDLIBS1="-lpython${PyVERSION}"
+    fi
-    LDLIBS1=`${PYTHON_BIN} -c 'import distutils.sysconfig;\
-        print(distutils.sysconfig.get_config_var("LDLIBRARY"))'`

Originally posted by @ewah in #81 (comment)

Addressing the issue with python script.

[grisha]

So are you saying that #90 should be merged and what about #86?

[ajarzyn]

#90 will overwrite changes from #86. In my opinion #86 will just change group affected by that problem and because of that it shoulnd't be merged at all.
As the @ewah commented under #81 using BLDLIBRARY can't guarantee proper result, as the result is related to build method of python's binary.

Thus we need better method to get python version.