Update changelog and bump preview version (#770)

Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = "Azure SDK for Embedded C"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "1.0.0-preview.1"
+PROJECT_NUMBER         = "1.0.0-preview.2"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

sdk/core/core/CHANGELOG.md

@@ -1,6 +1,8 @@
 # Release History
 
 ## 1.0.0-preview.2 (Unreleased)
+- Update top-level CMakeLists.txt to only add subdirectory for specified platform.
+- Add compilation option to remove all logging from SDK code.
 
 ## 1.0.0-preview.1 (2020-05-12)
 Initial release. Please see the [README](https://github.com/Azure/azure-sdk-for-c/blob/master/README.md) for more information.

sdk/core/core/inc/az_version.h

@@ -18,7 +18,7 @@
 // @brief Version in string format for telemetry.
 //   Follows semver.org standard.
 //   https://semver.org
-#define AZ_SDK_VERSION_STRING "1.0.0-preview.1"
+#define AZ_SDK_VERSION_STRING "1.0.0-preview.2"
 
 // @brief Major numeric identifier.
 #define AZ_SDK_VERSION_MAJOR 1
@@ -31,6 +31,6 @@
 
 // @brief Optional pre-release identifier.
 //  SDK is in a prerelease state when present.
-#define AZ_SDK_VERSION_PRERELEASE "preview.1"
+#define AZ_SDK_VERSION_PRERELEASE "preview.2"
 
 #endif //_az_VERSION_H