Add Bourns inductors

Created by: Salamandar

Add Bourns inductors

SRR7045

• http://www.bourns.com/docs/Product-Datasheets/SRR7045.pdf
• 
• I found the official STEP file here : https://www.bourns.com/engineering/SRR7045/srr7045.stp

SRP7050TA

• http://www.bourns.com/docs/Product-Datasheets/SRP7050TA.pdf
• 
• I found the official STEP file here : https://www.bourns.com/engineering/SRR7045/srr7045.stp