[svn-r19303] bug 1678: temporary fix.

Description: aix -q32 default to a memory limit that some HDF5 tests would
fail in malloc.

Solution:
Temporary hardset
RUNSERIAL=${RUNSERIAL="env LDR_CNTRL=MAXDATA=0x20000000@DSA"}
to bypass this problem until the test programs are fixed.  Though -q64 binary
has a higher default memory limit and does not need this patch, it is applied
the same for the sake of simplicity since it is a temporary fix.

Tested:
in uP, tested 32 and -q64 modes. No h5committest since this applies to the
AIX platform only.

config/powerpc-ibm-aix5.x

@@ -35,6 +35,11 @@ if test "X-$enable_parallel" = "X-yes" -o X-$CC_BASENAME = X-mpcc_r; then
     RUNPARALLEL=${RUNPARALLEL="env MP_PROCS=\$\${NPROCS:=3} MP_TASKS_PER_NODE=\$\${NPROCS:=3} poe"}
 fi
 
+# Temporary patch for Bug 1678. -q32 binary default to run with smaller memory.
+# Ask for more memory so that "make check" will pass. Not necessary for -q64
+# mode but it does no harm.
+RUNSERIAL=${RUNSERIAL="env LDR_CNTRL=MAXDATA=0x20000000@DSA"}
+
 
 #----------------------------------------------------------------------------
 # Compiler flags. The CPPFLAGS values should not include package debug