Snippets for gjs 1.90.0 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/community/gjs/gjs-1.90.0-r0.log.

• ../subprojects/gobject-introspection-tests/regress.c:3829:43: warning: variable 'parent_class' set but not used [-Wunused-but-set-global]
   3829 | static RegressTestFundamentalObjectClass *parent_class = NULL;
        |                                           ^
  

• ../gjs/profiler.cpp:89:35: warning: unused variable 'FLUSH_DELAY' [-Wunused-const-variable]
     89 | static const std::chrono::seconds FLUSH_DELAY = 3s;
        |                                   ^~~~~~~~~~~
  

• ../gjs/profiler.cpp:90:40: warning: unused variable 'SAMPLING_PERIOD' [-Wunused-const-variable]
     90 | static const std::chrono::milliseconds SAMPLING_PERIOD = 1ms;
        |                                        ^~~~~~~~~~~~~~~