let errchk exit 0 even if it has reported a BUG.
it echoed BUG and that's all that matters.
R=r
DELTA=143 (1 added, 89 deleted, 53 changed)
OCL=32533
CL=32542
so that golden.out does not include
the name of the compiler (which is
arch-specific and shows up in diffs).
R=r,iant
DELTA=3 (0 added, 0 deleted, 3 changed)
OCL=31980
CL=31983
using a variable is not sufficient, because
sometimes bug() is called from a subshell.
R=iant
DELTA=7 (2 added, 1 deleted, 4 changed)
OCL=18092
CL=18145
constant without an explicit conversion. I think that is a
bug. This adds a test case for it.
Also, change errchk to include the string BUG in error
messages, so that failures are included in the count reported
by the run shell script.
R=r,ken
DELTA=11 (7 added, 0 deleted, 4 changed)
OCL=15857
CL=15880
permits testing that the compiler emits error messages for
specific lines that match egrep regexps. The desired error
messages are expressed using comments of the form
// ERROR "regexp"
R=r
DELTA=90 (73 added, 8 deleted, 9 changed)
OCL=15513
CL=15566
