Fix source code permissions

Files had executable flag turn on, previously.
https://bugzilla.redhat.com/show_bug.cgi?id=1247348
diff --git a/expat/amiga/expat_68k.h b/expat/amiga/expat_68k.h
old mode 100755
new mode 100644
diff --git a/expat/amiga/expat_68k_handler_stubs.c b/expat/amiga/expat_68k_handler_stubs.c
old mode 100755
new mode 100644
diff --git a/expat/amiga/expat_lib.c b/expat/amiga/expat_lib.c
old mode 100755
new mode 100644
diff --git a/expat/amiga/launch.c b/expat/amiga/launch.c
old mode 100755
new mode 100644
diff --git a/expat/gennmtab/gennmtab.c b/expat/gennmtab/gennmtab.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/codepage.c b/expat/xmlwf/codepage.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/codepage.h b/expat/xmlwf/codepage.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/ct.c b/expat/xmlwf/ct.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/filemap.h b/expat/xmlwf/filemap.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/readfilemap.c b/expat/xmlwf/readfilemap.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/unixfilemap.c b/expat/xmlwf/unixfilemap.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/win32filemap.c b/expat/xmlwf/win32filemap.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlfile.c b/expat/xmlwf/xmlfile.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlfile.h b/expat/xmlwf/xmlfile.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlmime.c b/expat/xmlwf/xmlmime.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlmime.h b/expat/xmlwf/xmlmime.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmltchar.h b/expat/xmlwf/xmltchar.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlurl.h b/expat/xmlwf/xmlurl.h
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlwf.c b/expat/xmlwf/xmlwf.c
old mode 100755
new mode 100644
diff --git a/expat/xmlwf/xmlwin32url.cxx b/expat/xmlwf/xmlwin32url.cxx
old mode 100755
new mode 100644