all_test.go - remove the temp db between scripts to prevent not quite closed/deleted/race.

malloc5.test - skip tests requiring memstats collection
pager1.test - skip 2 tests in non-functional sets.
snapshot_fault.test - skip test w/failing forcedelete
testdata/tcl/tester.tcl - fix get_pwd to return output of 'cd'

testdata/tcl/snapshot_fault.test

@@ -22,6 +22,12 @@ set testprefix snapshot_fault
 # reading a corrupt snapshot even if a second client fails while 
 # checkpointing the db.
 #
+
+# This test relies on a forcedelete of an open file
+# resulting in: error deleting "test.db": permission denied
+# Not possible to remove the open file
+if {$::tcl_platform(platform)!="windows"} {
+
 do_faultsim_test 1.0 -prep {
   faultsim_delete_and_reopen
   sqlite3 db2 test.db
@@ -60,6 +66,7 @@ do_faultsim_test 1.0 -prep {
 
   sqlite3_snapshot_free $::snapshot
 }
+}
 
 #-------------------------------------------------------------------------
 # This test is similar to the previous one. Except, after the