File petsc-3.7-fix-pastix-detection.patch of Package petsc.15535

From: Kshitij Kulshreshtha <kkhere.geo@gmail.com>

The pastix package contains a pkgconfig file in all lower case
so check for the name here in all lower case too.

---
 config/BuildSystem/config/package.py |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/config/BuildSystem/config/package.py
+++ b/config/BuildSystem/config/package.py
@@ -153,7 +153,10 @@ class Package(config.base.Configure):
     self.PACKAGE          = self.name.upper()
     self.package          = self.name.lower()
     self.downloadname     = self.name
-    self.pkgname          = self.name
+    if self.name == 'PaStiX':
+      self.pkgname = self.name.lower()
+    else:
+      self.pkgname          = self.name
     self.downloaddirnames = [self.downloadname];
     return