fix broken debian patch (whitespace issue)

deb_patches/build-with-libstdc++-7.patch

@@ -1,7 +1,5 @@
-Description: point clang to the toolchain provided by the gcc-mozilla package (version 7 required for C++ 17), and statically link against libstdc++
+diff --git a/build/moz.configure/toolchain.configure b/build/moz.configure/toolchain.configure
-Author: Olivier Tilloy <olivier.tilloy@canonical.com>
+index ce42ab7..b07514f 100755
-Bug-Ubuntu: https://launchpad.net/bugs/1856861
-
 --- a/build/moz.configure/toolchain.configure
 +++ b/build/moz.configure/toolchain.configure
 @@ -1252,6 +1252,7 @@ try_compile(includes=['cstddef'],
@@ -12,7 +10,7 @@ Bug-Ubuntu: https://launchpad.net/bugs/1856861
              check_msg='for new enough STL headers from libstdc++',
              when=needs_libstdcxx_newness_check,
              onerror=die_on_old_libstdcxx)
-@@ -1433,6 +1434,10 @@ set_config('_DEPEND_CFLAGS', depend_cfla
+@@ -1433,6 +1434,10 @@ set_config('_DEPEND_CFLAGS', depend_cflags(c_compiler))
  set_config('_HOST_DEPEND_CFLAGS', depend_cflags(host_c_compiler))
  
  
@@ -23,14 +21,29 @@ Bug-Ubuntu: https://launchpad.net/bugs/1856861
  @depends(c_compiler)
  def preprocess_option(compiler):
      # The uses of PREPROCESS_OPTION depend on the spacing for -o/-Fi.
-@@ -2137,6 +2142,7 @@ def linker_ldflags(linker, macos_sdk, ho
+@@ -2133,7 +2138,7 @@ def linker_ldflags(linker, macos_sdk):
+             flags.append('-Wl,-syslibroot,%s' % macos_sdk)
+         else:
              flags.append('-Wl,--sysroot=%s' % macos_sdk)
-     elif host.cpu == 'arm':
+-
-         flags.append('-Wl,--no-keep-memory')
 +    flags.append('-static-libstdc++')
      return flags
  
  
+diff --git a/layout/style/test/moz.build b/layout/style/test/moz.build
+index 5b77bd8..3b8f869 100644
+--- a/layout/style/test/moz.build
++++ b/layout/style/test/moz.build
+@@ -18,6 +18,7 @@ DIRS += ['gtest']
+ HostSimplePrograms([
+     'host_ListCSSProperties',
+ ])
++HOST_CXXFLAGS += ['--gcc-toolchain=/usr/lib/gcc-mozilla']
+ 
+ MOCHITEST_MANIFESTS += [
+     'mochitest.ini',
+diff --git a/servo/components/style/build_gecko.rs b/servo/components/style/build_gecko.rs
+index dfd2a21..5696e2a 100644
 --- a/servo/components/style/build_gecko.rs
 +++ b/servo/components/style/build_gecko.rs
 @@ -149,6 +149,8 @@ impl BuilderExt for Builder {
@@ -42,13 +55,3 @@ Bug-Ubuntu: https://launchpad.net/bugs/1856861
          for dir in SEARCH_PATHS.iter() {
              builder = builder.clang_arg("-I").clang_arg(dir.to_str().unwrap());
          }
---- a/layout/style/test/moz.build
-+++ b/layout/style/test/moz.build
-@@ -18,6 +18,7 @@ DIRS += ['gtest']
- HostSimplePrograms([
-     'host_ListCSSProperties',
- ])
-+HOST_CXXFLAGS += ['--gcc-toolchain=/usr/lib/gcc-mozilla']
- 
- MOCHITEST_MANIFESTS += [
-     'mochitest.ini',