Update to v102r06 release.

byuu says:

Changelog:

  - added higan/emulator/platform.hpp (moved out Emulator::Platform from
    emulator/interface.hpp)
  - moved gmake build paramter to nall/GNUmakefile; both higan and
    icarus use it now
  - added build=profile mode
  - MD: added the region select I/O register
  - MD: started to add region selection support internally (still no
    external select or PAL support)
  - PCE: added cycle stealing when reading/writing to the VDC or VCE;
    and when using ST# instructions
  - PCE: cleaned up PSG to match the behavior of Mednafen (doesn't
    improve sound at all ;_;)
      - note: need to remove loadWaveSample, loadWavePeriod
  - HuC6280: ADC/SBC decimal mode consumes an extra cycle; does not set
    V flag
  - HuC6280: block transfer instructions were taking one cycle too many
  - icarus: added code to strip out PC Engine ROM headers
  - hiro: added options support to BrowserDialog

The last one sure ended in failure. The plan was to put a region
dropdown directly onto hiro::BrowserDialog, and I had all the code for
it working. But I forgot one important detail: the system loads
cartridges AFTER powering on, so even though I could technically change
the system region post-boot, I'd rather not do so.

So that means we have to know what region we want before we even select
a game. Shit.

nall/GNUmakefile

@@ -59,6 +59,23 @@ ifeq ($(compiler),)
   endif
 endif
 
+# build settings
+ifeq ($(build),release)
+  flags += -O3
+else ifeq ($(build),stable)
+  flags += -O1
+else ifeq ($(build),debug)
+  flags += -g
+else ifeq ($(build),profile)
+  flags += -pg
+  link += -pg
+else ifeq ($(build),instrument)
+  flags += -O3 -fprofile-generate
+  link += -lgcov
+else ifeq ($(build),optimize)
+  flags += -O3 -fprofile-use
+endif
+
 # clang settings
 ifeq ($(findstring clang++,$(compiler)),clang++)
   flags += -fno-strict-aliasing -fwrapv