Update bootstrap compiler to ldc 0.17.6 git snapshot

This makes the bootstrap compiler work with LLVM 6.

.gitignore

@@ -34,3 +34,4 @@
 /ldc-1.8.0-beta1-src.tar.gz
 /ldc-1.8.0-src.tar.gz
 /ldc-1.10.0-src.tar.gz
+/ldc-0.17.6-gita1a8a84-src.tar.gz

ldc.spec

@@ -10,7 +10,7 @@
 # Enable this for bootstrapping with an older version that doesn't require a
 # working D compiler to build itself
 %global bootstrap 1
-%global bootstrap_version 0.17.4
+%global bootstrap_version 0.17.6
 
 %undefine _hardened_build
 
@@ -26,7 +26,11 @@ License:        BSD
 URL:            https://github.com/ldc-developers/ldc
 Source0:        https://github.com/ldc-developers/ldc/releases/download/v%{version}%{?pre:-%{pre}}/%{name}-%{version}%{?pre:-%{pre}}-src.tar.gz
 %if 0%{?bootstrap}
-Source1:        https://github.com/ldc-developers/ldc/releases/download/v%{bootstrap_version}/%{name}-%{bootstrap_version}-src.tar.gz
+#Source1:        https://github.com/ldc-developers/ldc/releases/download/v%{bootstrap_version}/%{name}-%{bootstrap_version}-src.tar.gz
+# Git snapshot, generated with:
+# git clone git@github.com:ldc-developers/ldc.git project; pushd project; git checkout ltsmaster; git reset --hard a1a8a84; git submodule update --init; popd
+# tar -czf ldc-0.17.6-gita1a8a84-src.tar.gz --exclude-vcs --transform=s/project/ldc-0.17.6-src/ project
+Source1:        ldc-0.17.6-gita1a8a84-src.tar.gz
 %endif
 Source3:        macros.%{name}
 
@@ -274,6 +278,7 @@ install -m0644 phobos.d.tags %{buildroot}/%{_datadir}/geany/tags/
 * Wed Jun 20 2018 Kalev Lember <klember@redhat.com> - 1:1.10.0-1
 - Update to 1.10.0
 - Enable bootstrap
+- Update bootstrap compiler to ldc 0.17.6 git snapshot
 
 * Mon Mar 19 2018 Tom Stellard <tstellar@redhat.com> - 1:1.8.0-2
 - Rebuild for LLVM 6.0.0 and re-enable JIT libraries.

sources

@@ -1,2 +1,2 @@
-SHA512 (ldc-0.17.4-src.tar.gz) = d45abd1506387dca8d2eef6b5afe41b3015d362d09c7fc26c6ee861140d67690ee3db31cc06ca313ba39d5f75b9620db870410140e0dd78b9038361432b238ba
+SHA512 (ldc-0.17.6-gita1a8a84-src.tar.gz) = 6a0c42e152de3362acea4ba6e2b8eea64ffb36b96c70edbbe7d7f5b01bdca3561f19410c14211117263d8ebd6bd43621f25032327f5d6b0f135d37266c60101c
 SHA512 (ldc-1.10.0-src.tar.gz) = 6f46889dce6a4ba8450146b1e4929a73d9dee3b233f29e6054d3123ec370eb0155770686a27cc40d510fb777b12c00a7d70e255ad8265320b97cca8b47efe1ee