Got rid of the requirement to have a "package" directive. Fixed a grammar error

found in the process. Also taught the regression test system a new trick: the
path to "fped" can be passed in the environment variable FPED. E.g.,
FPED=fped.r5943 make test

- fped.c (usage, main): duplicating the -T option produces a dump to stdout
  before exiting (like %dump would)
- test/Common: new command fped_dump to invoked fped with a second -T option
- test/Common: if the environment variable FPED is set, use its content to
  invoke fped (default is ../fped)
- test/Common: if the environment variable CWD_PREFIX is set, prepend it to
  $FPED if the latter is a relative path 
- Makefile (test, tests): set CWD_PREFIX to .., so that the path given in FPED
  is valid at the point of invocation
- fpd.y: revised grammar to make "package" optional
- fpd.y: measurements were syntactically allowed inside non-root frame
  (test/structure)
- test/structure: test various combinations of the grammatical file structure
- test/tsort: removed all the now unnecessary "package" directives



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5944 99fdad57-331a-0410-800a-d7fa5415bdb3

test/tsort

@@ -4,8 +4,6 @@
 ###############################################################################
 
 fped "tsort: total order" <<EOF
-package "_"
-
 %tsort {
 	a b
 	a c
@@ -25,8 +23,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: partial order change (1)" <<EOF
-package "_"
-
 %tsort {
 	a b
 	a c
@@ -44,8 +40,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: partial order change (2)" <<EOF
-package "_"
-
 %tsort {
 	b c
 	c d
@@ -62,8 +56,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: old order differs from resolution order" <<EOF
-package "_"
-
 %tsort {
 	+a +b +c +d
 	a c
@@ -81,8 +73,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: order change due to priority" <<EOF
-package "_"
-
 %tsort {
 	a b
 	a c 1
@@ -99,8 +89,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: priority accumulation without decay" <<EOF
-package "_"
-
 %tsort {
 	+a +b +c +d
 	a b 1
@@ -117,8 +105,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped "tsort: priority accumulation with decay" <<EOF
-package "_"
-
 %tsort {
 	+a -b +c +d
 	a b 1
@@ -135,8 +121,6 @@ EOF
 #------------------------------------------------------------------------------
 
 fped_fail "tsort: cycle" <<EOF
-package "_"
-
 %tsort {
 	a b
 	b a