Log Message:
gcc7: update to 7.2.0

SPARC
    Support for the SPARC M8 processor has been added.
    The switches -mfix-ut700 and -mfix-gr712rc have been added to work around an \ 
erratum in LEON3FT processors.
    Use of the Floating-point Multiply Single to Double (FsMULd) instruction can \ 
now be controlled by the -mfsmuld and -fno-fsmuld options.

RTEMS
    The Ada run-time support uses now thread-local storage (TLS).
    Support for RISC-V has been added.
    Support for 64-bit PowerPC using the ELFv2 ABI with 64-bit long double has \ 
been added.

Bug fixes: \ 
https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=7.2