[OpenBLAS_jll] Upgrade to new build optimised for PowerPC (#48689)

* [OpenBLAS_jll] Upgrade to new build optimised for PowerPC

This only difference compared to previous build is that this one enables use of
dynamic architecture detection also for the PowerPC architecture.

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Co-authored-by: Valentin Churavy <[email protected]>
(cherry picked from commit aacfcf0)

Author: 2 people

Make.inc

@@ -848,7 +848,6 @@ endif
 # If we are running on powerpc64le or ppc64le, set certain options automatically
 ifneq (,$(filter $(ARCH), powerpc64le ppc64le))
 JCFLAGS += -fsigned-char
-OPENBLAS_DYNAMIC_ARCH:=0
 OPENBLAS_TARGET_ARCH:=POWER8
 BINARY:=64
 # GCC doesn't do -march= on ppc64le