debian/rules: fix setting EPICS_HOST_ARCH for amd64->i386 cross builds
update patches, add [-Werror=format-security] fixes in cap5
Changes for 3.14.12.3-7 (Multi-Arch, hardened build)
  * Install libraries in Multi-Arch compatible location (compat = 9)
  * Add Debian build flags for hardened build, add fixes for sucessful build
  * Link --as-needed to avoid unnecessary binary dependencies
  * Make epics-dev recommend ioclogserver (avoid dangling soft link)
  * Add Ralph Lange to Uploaders (avoid NMU warnings)
  * Remove unused lintian overrides for epics-dev