Security update for tensorflow2

Open Source Vulnerabilities openSUSE-SU-2020:1766-1

This update for tensorflow2 fixes the following issues: - updated to 2.1.2 with following fixes (boo#1177022): * Fixes an undefined behavior causing a segfault in tf.raw_ops.Switch (CVE-2020-15190) * Fixes three vulnerabilities in conversion to DLPack format (CVE-2020-15191, CVE-2020-15192, CVE-2020-15193) * Fixes two vulnerabilities in SparseFillEmptyRowsGrad (CVE-2020-15194, CVE-2020-15195) * Fixes an integer truncation vulnerability in code using the work sharder API (CVE-2020-15202) * Fixes a format string vulnerability in tf.strings.as_string (CVE-2020-15203) * Fixes segfault raised by calling session-only ops in eager mode (CVE-2020-15204) * Fixes data leak and potential ASLR violation from tf.raw_ops.StringNGrams (CVE-2020-15205) * Fixes segfaults caused by incomplete SavedModel validation (CVE-2020-15206) * Fixes a data corruption due to a bug in negative indexing support in TFLite (CVE-2020-15207) * Fixes a data corruption due to dimension mismatch in TFLite (CVE-2020-15208) * Fixes several vulnerabilities in TFLite saved model format (CVE-2020-15209, CVE-2020-15210, CVE-2020-15211)