Added initial changelog (#105)

[ROCm/rocshmem commit: 644857d375]

projects/rocshmem/CHANGELOG.md

@@ -0,0 +1,37 @@
+# Changelog for rocSHMEM
+
+## Unreleased - rocSHMEM 2.x.x for ROCm x.x.x
+
+### Added
+
+* Added the Reverse Offload conduit
+* Added new APIs:
+   * `rocshmem_barrier`
+   * `rocshmem_barrier_wave`
+   * `rocshmem_barrier_wg`
+   * `rocshmem_barrier_all`
+   * `rocshmem_barrier_all_wave`
+   * `rocshmem_barrier_all_wg`
+   * `rocshmem_sync`
+   * `rocshmem_sync_wave`
+   * `rocshmem_sync_wg`
+   * `rocshmem_sync_all`
+   * `rocshmem_sync_all_wave`
+   * `rocshmem_sync_all_wg`
+   * `rocshmem_init_attr`
+   * `rocshmem_get_uniqueid`
+   * `rocshmem_set_attr_uniqueid_args`
+* Added dlmalloc based allocator
+* Added XNACK support
+* Added support for initialization with MPI communicators other than `MPI_COMM_WORLD`
+
+### Changed
+
+* Changed collective APIs to use `_wg` suffix rather than `_wg_` infix
+
+### Resolved Issues
+
+* Resolved incorrect output for `rocshmem_ctx_my_pe` and `rocshmem_ctx_n_pes`
+* Resolved multi-team errors by providing team specific buffers in `rocshmem_ctx_wg_team_sync`
+* Resolved segfault in `rocshmem_wg_ctx_create`, now provides nullptr if ctx cannot be created
+* Resolved missing implementation of `rocshmem_g` for IPC conduit