fbc: allow -fpmode and -fpu options on #cmdline

Allow fpmode fast|precise to be specified independently
of other options.  Default is -fpmode precise.  Remove
a check where 'fast' was only allowed with '-fpu sse'.

- default is -fpu x87 for x86 and x86_64

Note:
  'fpmode fast|precise' chooses the kind of floating
  point code generated directly by fbc.  gcc has its own
  options.  When using '-gen gcc' pass '-Wc -ffast-math'
  to tell gcc to optimize with fast floating point.

Author: jayrm

src/compiler/fbc.bas

@@ -2979,8 +2979,7 @@ private sub hCheckArgs()
 	''
 	select case( fbGetOption( FB_COMPOPT_FPUTYPE ) )
 	case FB_FPUTYPE_FPU
-		if( fbGetOption( FB_COMPOPT_VECTORIZE ) >= FB_VECTORIZE_NORMAL ) or _
-		    ( fbGetOption( FB_COMPOPT_FPMODE ) = FB_FPMODE_FAST ) then
+		if( fbGetOption( FB_COMPOPT_VECTORIZE ) >= FB_VECTORIZE_NORMAL ) then
 			errReportEx( FB_ERRMSG_OPTIONREQUIRESSSE, "", -1 )
 			fbcEnd( 1 )
 		end if