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openblas libraries lack CET support

Description:

openblas lacks CET support due to FFLAGS and ASMFLAGS not being set which is required to pass -fcf-protection to the Fortran compiler and assembler respectively.

Additional info:

Steps to reproduce:

$ readelf --notes usr/lib/libopenblas.so.0.3 

Displaying notes found in: .note.gnu.property
  Owner                Data size 	Description
  GNU                  0x00000020	NT_GNU_PROPERTY_TYPE_0
      Properties: x86 feature used: x86, x87, MMX, XMM, YMM, ZMM, MASK
	x86 ISA used: x86-64-baseline, x86-64-v2, x86-64-v3, x86-64-v4

Displaying notes found in: .note.gnu.build-id
  Owner                Data size 	Description
  GNU                  0x00000014	NT_GNU_BUILD_ID (unique build ID bitstring)
    Build ID: 9499001a2a7e4b9ee24c895b53ba90f3499a58e5
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