Install hardening-wrapper and use /bin/bash in openssl and libevent

Install hardening-wrapper, since the compiler setup on Linux requires
it.

Use #!/bin/bash rather than #!/bin/sh in the build scripts since the
compiler setup use bash specific commands.

projects/libevent/build

-#!/bin/sh
+#!/bin/bash
 set -e
 rootdir=$(pwd)
 [% pc(c('var/compiler'), 'var/setup', { compiler_tarfile => c('input_files_by_name/' _ c('var/compiler')) }) %]

projects/libevent/config

@@ -13,10 +13,15 @@ var:
     - libtool
 
 targets:
+  linux-x86_64:
+    var:
+      arch_deps:
+        - hardening-wrapper
   linux-i686:
     var:
       arch_deps:
         - libc6-dev-i386
+        - hardening-wrapper
 
 input_files:
   - project: docker-image

projects/openssl/build

-#!/bin/sh
+#!/bin/bash
 set -e
 rootdir=$(pwd)
 [% pc(c('var/compiler'), 'var/setup', { compiler_tarfile => c('input_files_by_name/' _ c('var/compiler')) }) %]

projects/openssl/config

@@ -10,11 +10,14 @@ targets:
   linux-x86_64:
     var:
       configure_opts: -shared enable-ec_nistp_64_gcc_128 linux-generic64
+      arch_deps:
+        - hardening-wrapper
   linux-i686:
     var:
       configure_opts: -shared linux-generic32
       arch_deps:
         - libc6-dev-i386
+        - hardening-wrapper
   windows-i686:
     var:
       configure_opts: '-shared --cross-compile-prefix=i686-w64-mingw32- mingw "-fstack-protector-all -Wstack-protector --param ssp-buffer-size=4 -fno-strict-overflow -Wno-missing-field-initializers -Wformat -Wformat-security -Wl,--dynamicbase -Wl,--nxcompat -Wl,--enable-reloc-section -lssp -L$gcclibs"'