Fix the mbedtls, clang, & linux-embedded builds (#1489)
Fix the mbedtls, clang, & linux-embedded builds (#1489)

It appears each step is run a new shell, so the environment is lost
so all build types are the same.

Merge "Setup Build Type" with bootstrap so we set up the right build
type.
nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip