Increase max ELF program sections processed for core files

To fix packcore test failure in sles12
Co-authored-by: NBradford D. Boyle <bboyle@pivotal.io>
Co-authored-by: NShaoqi Bai <sbai@pivotal.io>

gpMgmt/sbin/packcore

@@ -10,7 +10,7 @@ import shutil
 import stat
 import sys
 from optparse import OptionParser
-from subprocess import Popen, PIPE
+from subprocess import Popen, PIPE, STDOUT
 
 
 def _getPlatformInfo():
@@ -28,7 +28,17 @@ def _getPlatformInfo():
 
 
 def _getFileInfo(coreFile):
-    cmd = Popen(['/usr/bin/file', coreFile], stdout=PIPE)
+    cmd = Popen(['/usr/bin/file', '--version'], stdout=PIPE, stderr=STDOUT)
+    fileVersion = cmd.communicate()[0].split()[0].strip()
+    # file allow setting parameters from command line from version 5.21, refer:
+    # https://github.com/file/file/commit/6ce24f35cd4a43c4bdd249e8e0c4952c1f8eac67
+    # Set ELF program sections processed for core files to suppres "too many
+    # program headers" output
+    opts = ['/usr/bin/file']
+    if fileVersion >= 'file-5.21':
+        opts += ['-P', 'elf_phnum=2048']
+    opts += [coreFile]
+    cmd = Popen(opts, stdout=PIPE)
     return cmd.communicate()[0]